Definitions
American Heritage® Dictionary of the English Language, Fourth Edition
- adv. At what time: When will we leave?
- conj. At the time that: in the spring, when the snow melts.
- conj. As soon as: I'll call you when I get there.
- conj. Whenever: When the wind blows, all the doors rattle.
- conj. During the time at which; while: when I was young, I was sick all the time.
- conj. Whereas; although: She stopped short when she ought to have continued.
- conj. Considering that; if: How can he get good grades when he won't study?
- pro. What or which time: Since when has this been going on?
- n. The time or date: Have they decided the where and when?
Century Dictionary and Cyclopedia
- At what time? at which time?
- At the or any time that; at or just after the moment that; as soon as.
- At which time.
- At the same time that; whereas; while on the contrary: used adversatively, to denote contrast or incompatibility.
- When is often used as a quasi-pronoun, meaning ‘which time,’ introducing a dependent clause after since, till, or similar connective denoting time.
Wiktionary
- adv. Used to introduce questions about time.
- adv. Used to introduce indirect questions about time.
- conj. At what time.
- conj. At such time as.
- conj. As soon as.
- conj. At a time in the past
- pro. What time; which time
- n. The time.
GNU Webster's 1913
- adv. At what time; -- used interrogatively.
- adv. At what time; at, during, or after the time that; at or just after, the moment that; -- used relatively.
- adv. While; whereas; although; -- used in the manner of a conjunction to introduce a dependent adverbial sentence or clause, having a causal, conditional, or adversative relation to the principal proposition.
- adv. Which time; then; -- used elliptically as a noun.
Etymologies
- Middle English, from Old English hwenne; see kwo- in Indo-European roots.
Examples
“At various times on this blog, I have mentioned how much trouble I have reading series..when there is a significant gap between when I read each book.”
“When i was playing the part of stay at home mom...from when emily was born, to when josh was born 20 months later, until he was almost 2..when i went back to work...i spent A LOT of time being angry and jealous.”
“Just when I was convinced there were no parents out there who were intellectually qualified to reproduce…..and yet…..when I read some of the responses from people who have COMPLETELY missed your point…..”
“It begins when Socrates replies by under-quoting Homer: “We'll take counsel about what to say ˜when two go together along the way™” (174d2-3).”
“The action of the working classes in this direction will be even more successful when public opinion is influenced to a greater degree than at present, and _when the workingmen's parties in different lands are directed and instructed by the”
Socialism As It Is A Survey of The World-Wide Revolutionary Movement
“The Subject Accusative of the Infinitive is sometimes omitted when it refers to the same person as the subject of the leading verb, or can easily be supplied from the context; as, -- cum id nescīre Māgō dīceret, _when Mago said he did not know this_ (for sē nescīre).”
“Indicative; as, -- tum tua rēs agitur, pariēs cum proximus ārdet, _your own interests are at stake when your neighbor's house is burning_; cum vidēbis, tum sciēs, _when you see, then you will know.”
“Thus: -- scrībam epistulam, cum redieris, _I will write the letter when you have returned_ (lit. _when you shall have returned_).a. The Latin is much more exact in the use of the Future Perfect than the”
“For us, her freedom meant our freedom, the right to send her away when we chose; but our love knew no such _when_ in all the shameful possibilities of time, nor anything in all the cruel conspiracies of ingratitude so wrong as that right.”
“Sir Thomas Browne. (16051682) (continued) 2430Times before you, when even living men were antiquities, when the living might exceed the dead, and to depart this world could not be properly said to go unto the greater number.”

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